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Initially there was much more trouble in the form of popping-up advertisement windows at each mouse click on a link, but fortunately I could get rid oft it by using Kaspersky Internet Security, Adwcleaner 4.208 and HijackThis 205. Each tool found some malware I thus could remove. So the Google-problem is the only identifiable remaining at the moment.

My system time is adjusted correctly (because a divergence hereof is discussed as a cause of similar problems in the net). Moreover I reinstalled Firefox but without any success.

Perhaps someone here knows a smart solution without setting up the computer from the bottom; that would be nice. Thank you for your help!

BC AdBot (Login to Remove)

To completely clean Firefox it would be necessary to delete your Firefox profile. If after reinstalling Firefox and you still had your old bookmarks and other settings then the profile was not deleted.

Uninstall Firefox and then you can do a file search for Mozilla, Mozilla Firefox and Firefox....delete all.... and that should remove your profile.

Use the programs below to find more adware and remove.

Use CCleaner to remove Temporary files, program caches, cookies, logs, etc. Use the Default settings. No need to use the

Run the tool by double-clicking it. If you are using Windows Vista, 7, or 8; instead of double-clicking, right-mouse click JRT.exe and select "Run as Administrator".

The tool will open and start scanning your system.

Please be patient as this can take a while to complete depending on your system's specifications.

On completion, a log (JRT.txt) is saved to your desktop and will automatically open.

Post the contents of JRT.txt into your next message

“Every atom in your body came from a star that exploded and the atoms in your left hand probably came from a different star than your right hand. It really is the most poetic thing I know about physics...you are all stardust.”― Lawrence M. KraussA 1792 U.S. penny, designed in part by Thomas Jefferson and George Washington, reads “Liberty Parent of Science & Industry.”

Thank you for this very detailed and funktional appearing answer within a narrow time frame! Yet another process-related problem ocurred in workin through your problem solution list:

I uninstalled Firefox. Then after a library lookup for *mozilla* I noticed that Thunderbird files are included as well, so I also unistalled Thunderbird preventively. - So far, so good ...

But when I tried to delete the *mozilla*-files, some remained undeleted because of a lack of access privileges. A dialog box entitled »Dateizugriff wurde verweigert« (approx. in english: »file access denied«) appeared.

(this should be a screenshot of the box ... if the image upload via URL was successful ...)

Again I tried to solve that problem via online search but unsuccessfully - a boring topic that occurres frequently and remaines unsolved because I know far too little about that part of the system and it's significance. The main problem in following the statements of the tutorials: There ist no »Besitzer« (engl. »Owner«) tab in the dialog box »Erweiterte Sicherheitseinstellungen« (engl. »extended security settings«) where I should make the modifications (?)!

(another screenshot ...)

There are two undeleted files called »mozilla browser« (each 2 KB) in the directories

»C:\Windows\WinSxS\x86_netfx-aspnet_regbrowser_files_b03f5f7f11d50a3a_6.3.9600.16384_none_8c11719b8fd01c80« and

I think, if I could sucessfully get the user permission for deleting these files I would be able to manage the rest likewise and continue cleaning the computer. The dialog box says: »Sie muessen die erforderlichen Berechtigungen von "SYSTEM" erhalten um Aenderungen an dieser Datei durchfuehren zu koennen.« (approx. in english: »You have to receive the required privileges from "SYSTEM" to be able to alternate this file.«)

Can you please give me a hint how I could get the necessary access privileges from »SYSTEM« to proceed? - Thanks in advance!

Proceed with running the three programs. No need to delete those two files.

“Every atom in your body came from a star that exploded and the atoms in your left hand probably came from a different star than your right hand. It really is the most poetic thing I know about physics...you are all stardust.”― Lawrence M. KraussA 1792 U.S. penny, designed in part by Thomas Jefferson and George Washington, reads “Liberty Parent of Science & Industry.”